fungi!. fungi!! mostly multi-cellular, but can be unicellular can not move heterotrophs...
TRANSCRIPT
FUNGI!
FUNGI!!• Mostly multi-cellular, but can be
unicellular• Can not move • Heterotrophs
– Decomposers; absorb nutrients
Fungus Structure
• Hyphae: thread-like filaments that develop spores
• Septa: cross walls that divide hyphae into individual cells
• Mycellium: the network of branched hyphae
Mycellium
SeptaHyphae
Fungus Structure
• Mycellium is made of different kinds of hyphae– 3 main functions
•Anchor fungus• Invade food source•Form reproductive structures
• Cell walls made of Chitin– Provides strength and flexibility to each
fungal cell
Obtaining Energy
• Heterotrophic Decomposers–Process used to digest food:
Extracellular digestion
–Hyphae grow into cells of organic material and release digestive enzymes that break down material and sent it thorough hyphae into the fungus
Types of Fungi: Zygomycote
• Bread Molds• Food Molds
Types of Fungi: Basidiomycotes
• More Familiar
• Mushrooms, puffballs, stink holes, and nest fungus
Types of Fungi: Ascomycote
• Largest division
• Sac Fungus-small sacs of fungus
• Used in genetic research, bread and alcohol production
• Examples: yeast
Types of Fungi: Deuteromycotes
• Used in vaccines: penicillin, antibiotics
• Examples: Penicillium
Fungal Reproduction
• Sexual or asexual, depending on species and environmental conditions
• Three methods:– Fragmentation: Asexual–Budding: Sexual–Spore Formation: Asexual OR
Sexual
Fungal Reproduction• Fragmentation
– Multicellular. Pieces of hyphae are broken off and grow into new mycelia. Ex: Deuteromycotes
• Budding– Unicellular. After mitosis, new cell “buds” from
the original. Ex: Zygomycotes
• Spore Formation– Multicellular. Spores produced in a
sporangium. Once spore is in a favorable environment where new mycellium is formed. Ex: Basidiomycotes, Ascomycotes, Zygomycotes
Symbiosis In Fungus
• Mutualism: Fungus and photosynthetic partner– Lichens: Fungus and
Green Algae
• Parasitism: Absorb nutrients from living things with special hyphae that help absorb the host’s nutrients
• Saprophytes: Decomposers; feed on dead waste